EP2697658A1 - Method for detecting a rotation of a rotor of a generator - Google Patents
Method for detecting a rotation of a rotor of a generatorInfo
- Publication number
- EP2697658A1 EP2697658A1 EP12704044.2A EP12704044A EP2697658A1 EP 2697658 A1 EP2697658 A1 EP 2697658A1 EP 12704044 A EP12704044 A EP 12704044A EP 2697658 A1 EP2697658 A1 EP 2697658A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- voltage
- rotor
- generator
- rotation
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000005284 excitation Effects 0.000 claims description 33
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000004913 activation Effects 0.000 description 11
- 238000011156 evaluation Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 3
- 230000005669 field effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/46—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/08—Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation
Definitions
- phase signal for example a phase voltage
- the emergency start of the generator should, in the event that no communication between a higher-level control unit and a controller that controls the generator takes place, activate the controller.
- a change portion of the phase signal is evaluated, which forms due to the existing in the rotor of the generator remanence and the rotation of the rotor.
- the alternating component reaches an evaluable amplitude only at high speeds.
- the evaluation of the phase signal must therefore be carried out accordingly sensitive. However, this is expensive and reduces the robustness of the controller against interference.
- DE 43 27 485 A1 proposes a circuit arrangement in which detects the voltage of a phase against the ground and a further phase of the generator is connected via a resistor to ground. This increases the measured voltage.
- the invention is based on the finding that a rotational movement of a rotor of a generator can be detected efficiently by an evaluation of an excitation voltage in or on the exciter circuit of the generator. Because a voltage swing of the excitation voltage is higher than a stroke of the phase signal, which allows a more accurate and advantageous voltage detection and thus a more accurate detection of the rotational movement.
- the invention relates to a method for detecting a rotation of a rotor of a generator, measuring an excitation voltage in or on an excitation circuit of the generator, and detecting the rotation of the rotor based on the measured excitation voltage.
- the alternating component of the excitation voltage can be measured.
- the measurement of the alternating component allows a particularly accurate detection of a rotational movement of the rotor.
- the rotation of the rotor is detected only when the measured excitation voltage exceeds a predetermined value.
- the generator comprises a regulator for controlling a generator voltage, wherein the regulator is in an active state and in an inactive state, in particular in a standby mode, displaceable, wherein the excitation voltage is detected in the inactive state.
- a phase voltage is measured at a phase connection of the generator, wherein the rotation of the rotor in the active state can optionally be detected from the measured phase voltage.
- the rotation of the rotor can also be detected in a particularly advantageous manner if the excitation voltage can not be evaluated.
- the controller can be activated, in particular activated by means of a customer interface.
- a flexible activation of the controller is made possible in a particularly advantageous manner.
- the controller is set to the active state upon detected rotation of the rotor.
- the exciter voltage is measured via a bleeder resistor of the exciter circuit.
- the excitation voltage can be measured in a particularly simple manner.
- the rotation of the rotor of the generator is detected during emergency start on the basis of the exciter voltage.
- the rotation of the rotor can also be detected in a particularly advantageous manner if the excitation voltage can not be evaluated. If the controller is then activated, the rotation can be detected by means of a phase voltage at a phase connection of the generator.
- the invention relates to a control unit which is designed to carry out the method for detecting a rotation of a rotor of a generator.
- the control unit can be set up for the execution of the method, for example programmatically.
- Fig. 1 is a diagram of a method for detecting a rotation of a rotor of a generator
- Fig. 2 is an equivalent circuit diagram of an exciter circuit
- Fig. 3 exemplary voltage waveforms at the excitation circuit and the phase tap.
- FIG. 1 shows a diagram of a method for detecting a rotation of a rotor of a generator according to an embodiment.
- the method comprises measuring 101 an exciter voltage U E at an excitation circuit of the generator and detecting 103 the rotation of the rotor based on the measured exciter voltage U E.
- FIG. 2 shows an equivalent circuit diagram of an exciter circuit in an inactive state, for example in a stand-by state.
- the excitation circuit comprises a rotor winding 201, a switch 203, which may be designed, for example, as a field-effect transistor switch, and a freewheeling diode 205, which may be embodied, for example, by a suitable interconnection of a field-effect transistor switch.
- a gate-axis 207 of the switch 203 is connected via the rotor winding 201 against a reference potential, such as ground.
- An example positive activation potential can be applied to a first terminal 209 of the switch 203.
- a second terminal 211 of the switch 203 is connected via the free-wheeling diode 205 to the reference potential.
- a bleeder 213 is provided, which is connected to the second terminal 211 and the reference potential.
- the rotor winding 201 may have an inductance value of 150 mH and a resistance of 1.8 ohms.
- the switch 203 and the freewheeling diode 205 are elements of a controller which can be switched to an active and in an inactive state for controlling a voltage of a generator.
- the switch 203 and the freewheeling diode 205 are locked.
- the exciter circuit is separated from the activation potential. If the rotor rotates, a voltage U ind is induced in the rotor winding 201. about the leakage resistance 213, the corresponding excitation voltage U E is then measured.
- the DC component of the excitation voltage U E is determined by the reverse current of the switch 203 and the freewheeling diode 205, but is negligible due to the low resistance of the exciter circuit itself and the low reverse current.
- the alternating component of the excitation voltage U E is limited by free-wheeling diode 205 to a predetermined negative value.
- the excitation voltage may be limited to -0.45V.
- the activation takes place via the evaluation of the exciter circuit voltage. If the controller is activated, the switch 203 is switched. The voltage in the excitation circuit can no longer be evaluated. Therefore, the rotation or the rotational speed of the rotor can be determined in the active mode from the phase voltage.
- the excitation current builds up a large alternating component in the phase signal.
- the phase signal can therefore be evaluated in the active mode of the controller, especially with a much lower sensitivity.
- the evaluation of the phase signal can therefore be made much simpler and more robust.
- the rotation of the rotor can be detected on the basis of the measured excitation voltage.
- the controller ASIC can be realized in a smaller area, resulting in a cost reduction.
- the evaluation can alternatively be designed so that an activation takes place even at very low speeds.
- FIG. 3 shows a typical measured excitation voltage 301 with the rotor rotating in an inactive state and, for comparison, a corresponding phase voltage 303 at a phase tap at the same rotational speed.
- the voltage swing of the excitation voltage 301 is higher than the voltage swing of the phase voltage 303, which allows a more accurate detection of rotation of the rotor.
- the switch 203 When the controller is activated, the switch 203 is switched. The exciter circuit is then excited by the activation potential in a conventional manner. The In this case, rotary motion can be detected in the usual way via the phase tap.
- the activation of the controller via an evaluation of the excitation circuit voltage can be done. If, for example, the exciter circuit voltage induced by the rotational movement in the exciter circuit exceeds a predetermined value, for example 5% or 10% of the voltage swing, the regulator is activated and the switch 203 is switched. After activation of the controller, the voltage in the excitation circuit can no longer be evaluated and the speed is detected in a conventional manner by means of phase attack. This is particularly advantageous because at low speeds, the amplitude of the alternating component of the voltage across the excitation circuit is significantly greater than the alternating component of the phase voltage. For the emergency start, therefore, the voltage across the exciter circuit can be evaluated, while for the active mode, the voltage at the phase tap can be evaluated.
- a predetermined value for example 5% or 10% of the voltage swing
- an external signal for activation can generally be dispensed with and the generator can be activated by the voltage detected in the exciter circuit.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011007331A DE102011007331A1 (en) | 2011-04-13 | 2011-04-13 | Method for detecting a rotation of a rotor of a generator |
PCT/EP2012/052204 WO2012139786A1 (en) | 2011-04-13 | 2012-02-09 | Method for detecting a rotation of a rotor of a generator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2697658A1 true EP2697658A1 (en) | 2014-02-19 |
EP2697658B1 EP2697658B1 (en) | 2018-10-03 |
Family
ID=45607238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12704044.2A Active EP2697658B1 (en) | 2011-04-13 | 2012-02-09 | Method for detecting a rotation of a rotor of a generator |
Country Status (4)
Country | Link |
---|---|
US (1) | US20140111232A1 (en) |
EP (1) | EP2697658B1 (en) |
DE (1) | DE102011007331A1 (en) |
WO (1) | WO2012139786A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014206173A1 (en) * | 2014-04-01 | 2015-10-01 | Robert Bosch Gmbh | Method for determining a speed |
DE102015223900A1 (en) * | 2015-11-18 | 2017-05-18 | Robert Bosch Gmbh | Method and device for detecting a speed in a generator unit |
US10981524B2 (en) | 2016-07-13 | 2021-04-20 | Hitachi Automotive Systems, Ltd. | Electronic control unit |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1463599C3 (en) * | 1964-05-14 | 1974-01-03 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Device for initiating the self-excitation of an alternator |
DE4327485B4 (en) | 1993-08-16 | 2005-10-27 | Robert Bosch Gmbh | Circuit arrangement for measuring the rotational speed of a generator |
DE19611908A1 (en) * | 1996-03-26 | 1997-10-02 | Bosch Gmbh Robert | Device and method for generating a regulated voltage |
DE19732961A1 (en) * | 1997-07-31 | 1999-02-04 | Bosch Gmbh Robert | Regulator with phase voltage evaluation for a three-phase generator |
DE10056199A1 (en) * | 2000-01-11 | 2001-07-12 | Manfred Dorsch | Rotational speed detection method for asynchronous machine, involves determining undershoot in current of asynchronous machine to determine rotational speed |
US6396247B1 (en) * | 2000-11-15 | 2002-05-28 | Eaton Corporation | Exciter system with protection for manual regulator failure and an electric generator incorporating same |
US6809496B2 (en) * | 2002-09-16 | 2004-10-26 | Honeywell International Inc. | Position sensor emulator for a synchronous motor/generator |
US7183761B2 (en) * | 2004-02-20 | 2007-02-27 | The Furukawa Electric Co., Ltd. | Rotation sensor |
JP2005241268A (en) * | 2004-02-24 | 2005-09-08 | Aisin Seiki Co Ltd | Rotation sensor |
JP4605435B2 (en) * | 2004-03-24 | 2011-01-05 | アイシン精機株式会社 | Rotation detector |
DE102004023392A1 (en) * | 2004-05-12 | 2005-12-08 | Daimlerchrysler Ag | Hysteresis brake, in particular for an electric camshaft actuator |
US7365519B2 (en) * | 2005-04-06 | 2008-04-29 | Basler Electric Company | Excitation system having inner loop voltage regulator with by-pass capability |
DE102009029527A1 (en) * | 2009-09-17 | 2011-03-24 | Robert Bosch Gmbh | Switching arrangement for evaluation of phase signals of generator, has device for detecting amplitude of phase signals, where output of comparator is provided for evaluation of phase signals |
US8947075B2 (en) * | 2011-07-05 | 2015-02-03 | Asmo Co., Ltd. | Variable reluctance type angle sensor |
-
2011
- 2011-04-13 DE DE102011007331A patent/DE102011007331A1/en not_active Withdrawn
-
2012
- 2012-02-09 US US14/111,508 patent/US20140111232A1/en not_active Abandoned
- 2012-02-09 EP EP12704044.2A patent/EP2697658B1/en active Active
- 2012-02-09 WO PCT/EP2012/052204 patent/WO2012139786A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2012139786A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2012139786A1 (en) | 2012-10-18 |
EP2697658B1 (en) | 2018-10-03 |
US20140111232A1 (en) | 2014-04-24 |
DE102011007331A1 (en) | 2012-10-18 |
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